Malicious PDF — malware analysis report

Static analysis result for SHA-256 54512c3c75710565…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 22:40:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c70a8b0c7fb1eda14119c974e5ff1a72 SHA-1: bdf725b8ba79d02b19e56f7c5916d5f972c52601 SHA-256: 54512c3c7571056525aa127f7ede2d2b8335ffe505bda72f020dfe79b3c35e63
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and a document body that promotes free game items and exploits, indicating a lure for users to download malicious content. The PDF_SEO_LINK_FARM heuristic firing suggests a large number of external links were generated, likely to obscure the malicious intent and distribute the payload across multiple domains. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/free-roblox-accouts-that-work-game-hack
    • http://elibrary.smknesbu.sch.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-model-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-sites_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-doge-hat-for-free-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-cheating-text-scripts_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-redeem-card-codes-free-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/new-roblox-infinite-jump-exploit-hack-working-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/games-that-can-give-you-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-tips_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/optifine-mcpe_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/the-streets-roblox-exploit-free-easy_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-wear-no-clothing-in-roblox-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/facebook-roblox-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-hack-that-works-jailbreak_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/download-minecraft-bedrock_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-hack-tools_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-generator-download-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f75.bin
c0951342c50148dce0d12a1c8e68d18e3a1d864bd9b4086baeaacfad5dc3e96f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F75 21996 bytes
font_01_sfnt_off0000601a.bin
59654fd9e383ba2d409a3d21ca5aa4c9ede1b0e60db399fc2683e6f1177a3772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x601A 19428 bytes

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